Home / 142,387.47-213,475.77-86,214.38

Finding the Fourth Proportional to 142,387.47, 213,475.77 and 86,214.38

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Solution

The fourth proportional to 142,387.47, 213,475.77 and 86,214.38 is: 129,257.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,387.47 : 213,475.77 = 86,214.38 : x
  2. Step 2: Convert to fraction form
    142,387.47/213,475.77 = 86,214.38/x
  3. Step 3: Cross multiply
    142,387.47x = 213,475.77 × 86,214.38
  4. Step 4: Simplify right side
    142,387.47x = 18,404,680,088.19
  5. Step 5: Solve for x
    x = 18,404,680,088.19/142,387.47
  6. Step 6: Final answer
    x = 129,257.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.